1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa528560763a8fcabb0a8027beb470b660cc3c8d6086d7a68edc4ae5d405f83. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3baddc5d-32cd-4a7d-81ce-adfc2f6da1ea.json and https://artists.proofprofile.net/proofs/artist/3baddc5d-32cd-4a7d-81ce-adfc2f6da1ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6face75991e2428534e32a90d7b4137c921214e58dc69c38765fd9539daeee3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3HH2336936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab29eff0b054efdaf5a2c509bb28223f8df4cb183d50b29be6dc8bc53deb0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8KD2243703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91cbb4ffae9c1a8898e5ccb5d0ebe6909fe5fa10b0c4e59cb577791d7c8f276. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2238205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8ad546d6839b35c5e61871256049850ad0c123365dd2251713ae5eeae491da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2251753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab6d17deaaf7e5bbc7b23631b796a60499d0c7373cb85d1fb68aa29dff4e683. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2379303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7bf1e729e0e761ecf6468f1d1b2d82cd2aae1429f034844d92d19d585580d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52314883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7550c5e96ddf6c0f50acb34868c241a300987bb7675b3f8c47e79f80d09416. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2326997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6face75991e2428534e32a90d7b4137c921214e58dc69c38765fd9539daeee3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3HH2336936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52162b37ab1334b4da0632e2795436acc3834bfdf877feafcb46174875e34568. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8KD2376999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1981537e9c49a899ba88e2a4c0903673796bb36b46b23f534d19ae9c7951c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2344202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa95913f1598fd03ad40878b0835076c750e263b8d158f3cf943d577e6311dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52469336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fbbbf6671ca0b639f8fe6c9d7beeab2253aab6a97532b648fd04b9c6858eed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2477316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329f93b010b4b71def0bd4927bdc589c439da15ddddbb2f824d451fb466e6040. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8KD2417752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8671f0be59acc32557d3e9ffa03fc26b249b5c3db99a96caa0505e50aa3faf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2493551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeffecafe763989d423eb1d94738df1cd2040910a92eb340f7424408ac9f2c52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX5MY2393249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7bf1e729e0e761ecf6468f1d1b2d82cd2aae1429f034844d92d19d585580d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52314883.